stdbool.h
=========

POSIX specification:
 http://www.opengroup.org/onlinepubs/9699919799/basedefs/stdbool.h.html

Gnulib module: stdbool

Portability problems fixed by Gnulib:

  * This header file is missing on some platforms: AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1.

  * Some compilers have bugs relating to bool.

  * This header file defines true incorrectly on some platforms: OpenBSD 4.7 with gcc 2.95.

Portability problems not fixed by Gnulib:

  * <stdbool.h> must be #included before _Bool can be used.

  * You cannot assume that _Bool is a typedef; it might be a macro.

  * Bit-fields of type bool are not supported.  Portable code should use unsigned int foo : 1; rather than bool foo : 1;.

  * Casts and automatic conversions to bool don't test against the zero value or the null pointer, as they should.  Such casts should only be used if the value is known to be equal to 0 or 1.

  * You cannot assume that casting a floating point literal to bool will result in a constant expression.